MP/H Rules/Histology--Thyroid: How is the histology coded for a poorly differentiated thyroid carcinoma with rhabdoid phenotype arising in a papillary carcinoma?
MP/H Rules/Histology: In the absence of a tissue diagnosis, should the histology field be coded based on the findings of a suspicious cytology or a CT scan that clinically confirmed the diagnosis? See Discussion.
MP/H Rules/Primary site: What is the primary site and histology for a focus of papillary thyroid cancinoma, follicular variant, arising in thyroid tissue of mature cystic teratoma of the ovary?
MP/H Rules/Histology--Breast: If an in situ carcinoma diagnosed in 2007 demonstrates comedo necrosis, should the histology be coded to comedocarcinoma in situ? See Discussion.
MP/H Rules/Behavior--Appendix: How do you code mucinous cancers of the appendix? Is a "low grade mucinous appendix tumor/neoplasm" with peritoneal spread reportable? See Discussion.
MP/H Rules/Multiple Primaries--Melanoma: Is there a difference between multiple primary rules M6 and M7 because both rules state that tumors occurring more than 60 days apart are to be reported as multiple primaries? See Discussion.
MP/H Rules/Multiple primaries--Lung: How many primaries are to be reported for an adenocarcinoma of the lung in the right middle lobe of the lung and bronchioalveolar carcinoma, non-mucinous type in the right upper lobe? See Discussion.
MP/H Rules--Bladder: Is a TURBT in 4/07 that demonstrates papillary carcinoma (8130/3) followed two weeks later with biopsies that demonstrate high grade flat dysplasia/carcinoma in situ (8010/2) two primaries?
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